Tire-tread.



1. BLA|R,1R.

TIRE THEAD Patented Dec. 18

APPLIcmoNmLED AuGJs. 19|?.

lll

PATENT OFFICE.

JOHN BLAIR, RJOF ROCK SPRINGS, WYOMING.

TIRE-TREAD.

neuerer.

Specification of Letters Patent,

original application filed Match 191'?, Serial No. 152.588. DividedV and this application led August 28.

To all I[cli/2m 'it may confer/:L: l

lie it known that I. JoinY Bn-un, Jr., n

citizen of the llnitrd Sintes and u resident of Roch' Springs, in the county o'l Sweet water and State of Wyoming, have invented a new und liniiiroved 'Ifirefllrearh oi' which the following a i'ull. clear, and enact li-rsrription.

.lily present application is :i division of un application filed by me in the United States laient (li'li're on Murr-li Ty.' 191i', Serial No, lietl and whites to novel tread elcn'lents and ins-ans to mountv the suine on i tire. The tread is more particularly intended for application to a protective shell as shown in my aforenarned eppliction.

Reference is to be had to the accompany ing drawings.

yFigure 'l is a cross section ofi e tire equipped with my improved trend;

Fig.' 2 is u face View of e Wheel equipped with `my improved treed;

Fig. 3 is fregnientery developed view showing the inner 'fu-ce .of supporting l shell, to which the trend elements are epplied. in practice;

Fig. Il 1s e cross section on e reduced scale teken through the shell sind treed ele* ments et a transverse securing bolt.

'lhe numeral 1G indicates e' tire rim secured in any suitable manner to a. wheel rim-indicatedzit 11. The rim 10 is adapted to seat ai tire of any approved form, there being illustretedan inner tube l2 ende casing 13.` The rim 10 has annuler side channels `lhone of which is formed in a4 detachable rim member l0 and saidfchannels'lreceive the inner side edges of e proteetivesheil l5, all of which partsere' disclosed in my application above referred to.

On the outer periphery of the shell 15, tread bends 16 of unbroken continuity are received :ind clamped in position by transverse bolts 17 and nuts 18. The bolt heads and the nutsare received in channels v19 in the sides of the tread bands' said channels serving to thushouse and protect-,the boltV heads and the nuts and at the same time reducing the Weight of the treed bands WithoutV impeiring their strength,y it being understoodf'that the vseid ban s and the floating Serial No. 188,638.

shell ure :formed of stool in practice. AL the inner periphery ci carb tread baud 1G, the sain(` is beveled as indicated by the numvl'ul 22 and` the Suid beveled surfaces correspond 56 with the cross section oi the shell l5 which is Vshnpe to present. oppositely beveled surfaces 23, the, apex of the V bring at. the median line of the tire. Thus, the tight- @ning of the nuts 18 Will drmv thc tread 60 bands'ltl firmly to position by reason of the wcdging act-ion produced by tbc opposedA surfaces 23, on .said bends and shell. As best secu in Fig. i, th(l shell 24 at the apexl of its V-sliaped periphi-ry has produced therein :i transverse notch 2l which is positionecl iu'registe'r with or conqilelnentfary to the transverse bolt holes Q5 in the tread bands.y whereby a positively interl-ocked en gagement is effected between tbc bolts 1T and 70 Y the shell l5 to thereby prevent. creeping of the tread bands on theV shell. The numeral Q0 indicates a Wasbier employed beneath each nut 18.

Each trca d band lil is formed at the interior with a channel or recess 2l. `whereby each tread. band presents separated 'parallel Con-4 tect. surfaces bearing respectively ont the beveled surfaces 23 adjacent to the apex thereof'and laterally outward 4Froi'nthe apex 80 to insurea solid bearing of the trend bends on the shell. The channeling of-the tread 'bands furthermore makes them more responsive to the bolts 17 so that the tightening up of the nuts on the bolts Will insure thereon, for which purpose 'each benl. 16 is 95 produced with annular beads 36, and .in

said bands oblique recesses or depressions 37, are produce i Having thus described my invention, Iv

claim as new, and desire to secure by Letters 100 Patent: U

In a, tire etteehnient,l a Shell ada-pd to so that solid treed band i embraoee tire and formed V-shape at the periphery, the apex 'of the Vshape formation beingI outermost presenting convergent side surfaces, sebarate tread bends on said shell and bevele at the inner perpheriesto correspond 'with the convergent surfaces of the shell, said bands being formeel with channels at the interior, and tralsversebolts connecting seid treed bands and serving to draw the seme tightlyfinplace on the seid 10 shell, the contnmty ofv said channels being broken at the bolts to present solid tren band portions to take sald bolts.

JOHN BLAIR, JR. 

